Screen unit



FIG. 1 is a front elevational view of a screen unit showing our newdesign;

FIG. 2 is a plan view from above thereof;

FIG. 3 is a perspective view on one end thereof, in which the sideblinds and rear sheets have been removed and showing the front sheetspartly lowered;

FIG. 4 is a perspective view on said one end thereof, in which the sideblinds and rear sheets have been removed;

FIG. 5 is a perspective view on said one end thereof, with the sideblinds and rear sheets in position;

FIG. 6 is a perspective view on the other end thereof.

The ornamental design for a screen unit, substantially as shown anddescribed.